This sporting dog's ancestors came over on the Mayflower, but it wasn't registered with the American Kennel Club until 1878. Name this long-eared breed.

Answer American Cocker Spaniel

The American Cocker Spaniel and the English Cocker Spaniel are closely related; the two breeds diverged over the last 100 years because there are different breed standards in the United States and the U.K. The American Cocker Spaniel is sometimes known as the "Merry Cocker" due to its good "temperament with no suggestion of timidity".

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